Rethinking refuges: Implications of climate change for dam busting
Rethinking refuges: Implications of climate change for dam busting
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DOI：
10.1016/j.biocon.2017.02.007
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发表时间：
2017-05-01
影响因子：
5.9
通讯作者：
Weyl, Olaf L. F.
中科院分区：
文献类型：
--
作者：
Beatty, Stephen;Allen, Mark;Weyl, Olaf L. F.
预计气候变化将改变世界上每个人口稠密流域的河流流量。在世界某些地区，水坝拆除速度现已超过其建设速度，而干旱地区水坝成本效率的下降可能会进一步提高拆除速度。然而，气候变化对大坝拆除影响的潜在影响几乎没有受到考虑。大多数水坝都会产生重大的生物和生态影响，拆除它们将极大有利于河流生态系统。然而，通过使用南半球的模型区域，我们强调水坝创造的人工静默栖息地可以作为日益濒危的淡水鱼类的避难所，而且水坝还可以防止河流中外来入侵物种向上游扩散。我们认为，在这些和其他地区，气候变化的主要影响将是减少水流和水生保护区的可用性，水坝的负面和正面环境影响之间的平衡变化要求政策制定者将气候变化预测纳入水坝拆除的优先过程中。 (C) 2017 Elsevier Ltd. 保留所有权利。
Climate change is projected to alter river discharge in every populated basin in the world. In some parts of the world, dam removal now outpaces their construction and the diminishing cost efficiency of dams in drying regions is likely to further increase the rate of removals. However, the potential influence of climate change on the impact of dam removals has received almost no consideration. Most dams have major biological and ecological impacts and their removal would greatly benefit riverine ecosystems. However, using model regions in the Southern Hemisphere, we highlight that artificial lentic habitats created by dams can act as refuges for increasingly imperiled freshwater fishes, and dams may also prevent the upstream spread of invasive alien species in rivers. We argue that, in these and other regions where the major impact of climate change will be to reduce streamfiow and aquatic refuge availability, a shifting balance between the negative and positive environmental impacts of dams requires policy makers to include climate change predictions in prioritisation processes for dam removal. (C) 2017 Elsevier Ltd. All rights reserved.